How can I find out what branches are on QA and not production?

I'd like to use git to see branches merged into QA, but not Main, How can I do that?

Answer

The maybe not so elegant way I've done this is:

1. Make sure your local git knows about all remote branches: git fetch --all
2. Get a list of branches merged into QA on your clipboard: git checkout qa; git pull; git branch -r --merged | clip
3. Paste that into a diffing tool.
4. Do the same for main: git checkout main; git pull; git branch -r --merged | clip
5. Paste into the other panel of your diffing tool.

Compare the branches in your tool. This is usually a pretty quick way to get a good visual representation.